Xie Yangyi, Liu Jiqiao, Jiang Jiaxin, Chen Weibiao. Wavelengths optimization to decrease error for a space-borne lidar measuring CO2 concentration[J]. Infrared and Laser Engineering, 2014, 43(1): 88-93.
| Citation:
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Xie Yangyi, Liu Jiqiao, Jiang Jiaxin, Chen Weibiao. Wavelengths optimization to decrease error for a space-borne lidar measuring CO2 concentration[J]. Infrared and Laser Engineering, 2014, 43(1): 88-93.
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Wavelengths optimization to decrease error for a space-borne lidar measuring CO2 concentration
- 1.
Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;
- 2.
University of Chinese Academy of Sciences,Beijing 100049,China
- Received Date: 2013-05-11
- Rev Recd Date:
2013-06-13
- Publish Date:
2014-01-25
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Abstract
The relationship between atmospheric column-averaged CO2 concentration measurement errors and operating wavelengths of space-borne integrated path differential absorption (IPDA) lidar was studied. The column-averaged CO2 concentration measurement principle was presented, and the system random error, temperature uncertainty error, frequency drift error and H2O interference error as a function of the operating wavelengths of lidar were analyzed. The operating wavelengths were optimized to minimize the total concentration measurement error. For optimal IPDA lidar on-line and off-line wave number of 6 361.225 0 cm-1 and 6360.99cm-1, the total column-averaged CO2 concentration measurement error was calculated to be 0.58710-6 with 1K temperature error and 0.6MHz frequency drift error, which meets the requirement of the column- averaged CO2 concentration measurement with 110-6 accuracy. The optimized wavelengths are applicable for retrieval of column-averaged CO2 concentration with high precision for space-bore IPDA system.
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